algorithms 백준 (BOJ)

[BOJ]백준 8393번: 합 (baekjoon 8393)

2019.01.07 ·

(BOJ)백준 8393 - 8393번: 합

목차

• 코드
• 설명

8393번: 합

[BOJ] 백준 (8393)

백준 8393 - 8393번: 합

https://www.acmicpc.net/problem/8393

코드

import java.io.*;

public class B8393 {
    static int n;
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        n = Integer.parseInt(br.readLine());
        bw.write((n * (n + 1)) / 2 + "\n");
        bw.flush();bw.close();
    }
}

설명